Programming manual
CNC 8055
CNC 8055i
CANNED CYCLES
9.
·M· & ·EN· MODELS
SOFT: V02.2X
·157·
G69. Drilling canned cycle with variable peck
9.6 G69. Drilling canned cycle with variable peck
This cycle makes successive drilling steps until the final coordinate is reached. The tool withdraws
a fixed amount after each drilling operation, it being possible to select that every J drillings it
withdraws to the reference plane. A dwell can also be programmed after every drilling.
Working in Cartesian coordinates, the basic structure of the block is as follows:
G69 G98/G99 X Y Z I B C D H J K L R
[ G98/G99 ] Withdrawal plane
G98 The tool withdraws to the Initial Plane, once the hole has been drilled.
G99 The tool withdraws to the Reference Plane, once the hole has been drilled.
[ X/Y±5.5 ] Machining coordinates
These are optional and define the movement of the axes of the main plane to position the tool at
the machining point.
This point can be programmed in Cartesian coordinates or in polar coordinates, and the coordinates
may be absolute or incremental, according to whether the machine is operating in G90 or G91.
[ Z±5.5 ] Reference plane
Defines the reference plane coordinate. It can be programmed in absolute coordinates or
incremental coordinates, in which case it will be referred to the initial plane.
If not programmed, it assumes as reference plane the current position of the tool.
[ I±5.5 ] Drilling depth.
Defines the total drilling depth. It can be programmed in absolute coordinates or incremental
coordinates and in this case will be referred to the part surface.
[ B5.5 ] Drilling peck (step)
Defines the drilling step in the axis longitudinal to the main plane.
[ C5.5 ] Approach to the previous drilling
Defines the approach distance the longitudinal axis will move in rapid (G00) from the previous drilling
step to start the next drilling step.
If not programmed, a value of 1 mm is assumed. If programmed with a 0 value, the CNC will display
the corresponding error message.
[ D5.5 ] Reference plane
Defines the distance between the reference plane and the surface of the part where the drilling is
to be done.
In the first drilling, this amount will be added to "B" drilling step. If not programmed, a value of 0 is
assumed.
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